Know how long it's been since a user has "seen" your app.
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Updated
Dec 5, 2021 - TypeScript
Know how long it's been since a user has "seen" your app.
Call one last function as a user leaves your web application
Wrapper for the Page Visibility API
Add a description, image, and links to the visibilitychange topic page so that developers can more easily learn about it.
To associate your repository with the visibilitychange topic, visit your repo's landing page and select "manage topics."